//
//  CJPNavigationController.m
//  快乐一点通
//
//  Created by cjp on 16/7/16.
//  Copyright © 2016年 cjp. All rights reserved.
//

#import "CJPNavigationController.h"
#import "PrefixHeader.h"

@interface CJPNavigationController ()

@end

@implementation CJPNavigationController

+ (void)initialize{
    UINavigationBar * bar = [UINavigationBar appearance];
    [bar setBackgroundImage:[UIImage imageNamed:@"navigationbarBackgroundWhite"] forBarMetrics:UIBarMetricsDefault];
    UITabBar *tabBar = [UITabBar appearance];
    [tabBar setBackgroundImage:[UIImage imageNamed:@"background-1"]];
}

- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated{
    
    if (self.childViewControllers.count > 0) { // 如果push进来的不是第一个控制器
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button setTitle:@"返回" forState:UIControlStateNormal];
        [button setImage:[UIImage imageNamed:@"navigationButtonReturn"] forState:UIControlStateNormal];
        [button setImage:[UIImage imageNamed:@"navigationButtonReturnClick"] forState:UIControlStateHighlighted];
        button.size = CGSizeMake(70, 30);

        // 让按钮内部的所有内容左对齐
        button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
        [button sizeToFit];
        button.contentEdgeInsets = UIEdgeInsetsMake(0, -10, 0, 0);
        [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted];
        [button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];
        viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:button];
        
        // 隐藏tabBar
        viewController.hidesBottomBarWhenPushed = YES;
    }
    // 这句super的push要放在后面,让viewContentView可以覆盖上面设置的leftBarButtonItem
    [super pushViewController:viewController animated:animated];
}

- (void)back{
    [self popViewControllerAnimated:YES];
}

@end
